I really want to do some weatherproofing on our house this year, but I want to make sure I only do things that will really make a significant difference. Money is limited, especially since I need to have the furnace inspected and cleaned, along with the chimney. Here's what I plan to do so far: Caulk the windows-inside and out. Install new draft stoppers on the exterior doors. Seal the really bad windows with the plastic stuff. Install covers on the hot water heater and hot water pipes. Cover the basement windows with cardboard (wanted to get them replaced but it aint happening this year) Cover the mail slot on the front door. And that's all I've come up with so far. I'd like to get a programmable thermostat, but again money might be an issue. We plan on using both fireplaces this year, and I am hoping that using the basement fireplace will really help keep the house warmer. We only used the upstairs fireplace last year and kept the thermostat at 64F during the daytime and 62F at night. We used a space heater upstairs because the temp will drop well below 60F when we keep the heat that low. (MAJOR insulation problems in this house...) What else can I do that isn't terribly expensive? The house needs new insulation, new siding, new windows, new everything really...but it will be a LONG time before those things are addressed. I want to be comfortable, darnit!